25921093902 has 16 divisors (see below), whose sum is σ = 56555114112. Its totient is φ = 7854876920.

The previous prime is 25921093901. The next prime is 25921093997. The reversal of 25921093902 is 20939012952.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25921093901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196371858 + ... + 196371989.

It is an arithmetic number, because the mean of its divisors is an integer number (3534694632).

Almost surely, 2^25921093902 is an apocalyptic number.

25921093902 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25921093902 is an abundant number, since it is smaller than the sum of its proper divisors (30634020210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25921093902 is a wasteful number, since it uses less digits than its factorization.

25921093902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392743863.

The product of its (nonzero) digits is 87480, while the sum is 42.

The spelling of 25921093902 in words is "twenty-five billion, nine hundred twenty-one million, ninety-three thousand, nine hundred two".